Rosco Manufacturing K9 Sauce Pack Rifle Barrel 5.56mm Patrol 1-7 Twist 1/2x28 Thread Nitride Black 12.5in SPK912BCGGTSNGB001. The result is a hand-picked list of parts that will produce results right out of the box. All parts within these kits are designed to synchronize together and create an un-interrupted system that will bring every individual component to its peak performance level. The perfect marriage of all their available Bloodline accessories and their in-house made barrels will make for the ultimate combo in performance and cost savings. Specifications for Rosco Manufacturing K9 Sauce Pack 5.56mm Threaded Rifle Barrel: Manufacturer: Rosco Manufacturing Color: Black Finish: Nitride Fabric/Material: 416R Material Caliber: 5.56mm Barrel Profile: Continuous Taper Gas System Length: Patrol Gas Block Journal Size-Diameter: .750 in Barrel Twist Rate: 1-7 Barrel Material: 416R Stainless Steel Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Firearms Threads Per Inch: 1/2x28 Package Contents: Rosco Manufacturing K9 Sauce Pack 5.56mm Threaded Rifle Barrel What firearm models does the manufacturer say Rosco Manufacturing K9 Sauce Pack 5.56mm Threaded Rifle Barrel is compatible with? The manufacturer says that Rosco Manufacturing K9 Sauce Pack 5.56mm Threaded Rifle Barrel is compatible with AR-15Rosco Manufacturing SPK912BCGGTSNGB001: K9 Sauce Pack Rifle Barrel 5.56mm Patrol 1-7 Twist 1/2x28 Thread Nitride Black 12.5in